CN104457800A - Process variable transmitter with dual compartment housin - Google Patents

Process variable transmitter with dual compartment housin Download PDF

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Publication number
CN104457800A
CN104457800A CN201410054296.5A CN201410054296A CN104457800A CN 104457800 A CN104457800 A CN 104457800A CN 201410054296 A CN201410054296 A CN 201410054296A CN 104457800 A CN104457800 A CN 104457800A
Authority
CN
China
Prior art keywords
process variable
compartment
terminal
variable transmitter
housing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201410054296.5A
Other languages
Chinese (zh)
Inventor
亚伦·安德鲁·佩罗
德克·威利·鲍谢克
劳伦·迈克尔·安格斯塔德
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rosemount Inc
Original Assignee
Rosemount Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rosemount Inc filed Critical Rosemount Inc
Priority to CN201711360421.5A priority Critical patent/CN107990916B/en
Publication of CN104457800A publication Critical patent/CN104457800A/en
Pending legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D11/00—Component parts of measuring arrangements not specially adapted for a specific variable
    • G01D11/24—Housings ; Casings for instruments
    • G01D11/245—Housings for sensors
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B13/00—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion
    • G05B13/02—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds

Landscapes

  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Software Systems (AREA)
  • Artificial Intelligence (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Evolutionary Computation (AREA)
  • Medical Informatics (AREA)
  • Health & Medical Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Automation & Control Theory (AREA)
  • Testing Or Calibration Of Command Recording Devices (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

A process variable transmitter for use in an industrial control or monitoring process is provided and includes a housing with a cavity formed therein. The housing includes an integrated terminal block which defines first and second compartments in the cavity. The transmitter further includes a process variable sensor configured to sense a process variable of the industrial process. Measurement circuitry is carried in the first compartment and configured to receive a process variable signal from the process variable sensor and provide an output. An electrical connection is carried on the integrated terminal block in the second compartment and is electrically coupled to the output of the measurement circuitry.

Description

There is the process variable transmitter of two compartment housing
Technical field
The present invention relates to industrial stokehold or monitoring system.Particularly, the present invention relates to the process variable transmitter being configured to testing process variable in this system.
Background technology
Process variable transmitter is used in industrial process control environment.This transmitter is connected to process fluid to provide the measurement result relevant to this process.Process variable transmitter can be configured to monitor and the fluid in processing factory, as chemical industry, paper pulp, oil, rock gas, medicine, food and the slurry in other fluid processing plants, liquid, one or more process variable that steam is relevant with gas.Exemplary monitored process variable comprises the pressure of fluid, temperature, flow, liquid level, pH value, conductivity, turbidity, density, concentration, chemical composition or other characteristic.Typically, process variable transmitter is positioned at usual remote location place at the scene, and sends information to middle position, as pulpit.Process variable transmitter detects the process variable in the multiple application comprising oil and natural gas refinery, chemical storage tanks field or chemical processing plant.In many instances, this requires that process variable transmitter is arranged in rugged environment.
The process variable transmitter of some types comprises the housing being divided into two independent compartments.A compartment comprises circuit, and another compartment comprises the terminal block for being connected to process control loop.In U.S. Patent No. 5,546, a kind of configuration has like this been shown in 804.
Summary of the invention
Provide a kind of process variable transmitter being used in Industry Control or observation process, it comprises the housing with the chamber be formed at wherein.Housing is included in chamber the integrated wiring plate limiting the first and second compartments.Transmitter also comprises the process variable sensor being configured to the process variable detecting industrial process.Metering circuit is supported in the first compartment, and be configured to receive from process variable sensor process variable signal and output is provided.Electrical connector to be supported on integrated wiring plate and to be electrically connected to the output of metering circuit in the second compartment.
According to one embodiment of present invention, comprise with process variable transmitter in industrial processes:
Housing, this housing has the chamber be formed at wherein, and this chamber extends between the first opening and the second opening, and described housing comprises the integrated wiring plate formed with this housing, and this integrated wiring plate defines the first compartment and the second compartment in described chamber;
Process variable sensor, it is configured to the process variable detecting industrial process;
Metering circuit, it to be carried in the first compartment and to be configured to the process variable signal that receives from process variable sensor and to provide output; With
Terminal-connecting element, it is carried on described terminal block in the second compartment, and is electrically connected to described metering circuit.
Preferably, electronics housing comprises polymkeric substance.
Preferably, process variable transmitter comprises wiring pin, and described wiring pin extends through polymer wall and provide electrical connection between metering circuit and terminal-connecting element.
Preferably, process variable transmitter comprises and is connected to wiring pin and the terminal screw assembly be arranged in the second compartment.
Preferably, terminal screw assembly comprises fork, and this fork extends in integrated wiring plate, thus terminal screw assembly is fixed to integrated wiring plate.
Preferably, terminal connector provides the electrical connection of leading to process variable sensor.
Preferably, terminal connector provides the electrical connection of leading to Two-wire process control loop.
Preferably, process variable transmitter comprises the screw being configured to electrical connector is fixed to terminal screw assembly.
Preferably, process variable sensor comprises temperature sensor.
According to another embodiment of the present invention, comprise the steps: for the manufacture of by the method for process variable transmitter in industrial processes
Molding process variable transmitter housing, this process variable transmitter housing has the chamber that is formed in wherein and comprises the integrated wiring plate described chamber being divided into the first compartment and the second compartment;
There is provided electrical connector, this electrical connector extends through integrated wiring plate to the second compartment from the first compartment;
The measurement electron device being connected to electrical connector is placed in the first compartment; And
Process variable sensor is connected to the terminal screw assembly in the second compartment, terminal screw electrical component is connected to the electrical connector extending through integrated wiring plate.
Preferably, by using the terminal screw assembly in the second compartment that metering circuit is connected to Two-wire process control loop by electrical connector.
Preferably, electrical connector comprises wiring pin.
Preferably, described method also comprises the steps:, with the fork link post screw assembly extended in integrated wiring plate, thus terminal screw assembly to be fixed to integrated wiring plate.
Preferably, process variable sensor comprises temperature sensor.
Preferably, described method also comprises the step adopting end cap seal first compartment and the second compartment.
Preferably, described method also comprises step process control loop being connected to the terminal connector in the second compartment.
Accompanying drawing explanation
Fig. 1 shows the schematic diagram comprising the cut-open view of the process variable transmitter of polymer wall and pin assemblies according to an embodiment of the invention.
Fig. 2 is the zoomed-in view of the pin assemblies of the process variable transmitter according to an embodiment of the invention of Fig. 1.
Fig. 3 is the front elevation of the transmitter of Fig. 1, shows terminal block and connects.
Fig. 4 shows the rough schematic view of the circuit of the transmitter of Fig. 1.
Embodiment
The invention provides a kind of use process variable transmitter in industrial processes, comprise the housing being divided into two compartments.These two compartments are limited by integrated wiring plate, and metering circuit to be sealed in the first compartment and to provide sealing between two compartments by integrated wiring plate.
Fig. 1 is the rough schematic view that industrial stokehold for monitoring or control the process fluid in industrial process or monitoring system 10 are shown.Typically, process variable transmitter 12 is arranged in the remote location place at scene, and the process variable detected is back to the pulpit 14 being positioned at middle position.Various technology may be used for transport process variable, comprises wired and both radio communications.A kind of line communication technology that common are adopts known Two-wire process control loop 16, and wherein list is used to transmission information to electric wire and provides electrical power to transmitter 12.Control between 4mA and 20mA by means of by the levels of current by process control loop 16 for transmitting a kind of technology of information.The value of the electric current within the scope of 4-20mA can be mapped to the value of the correspondence of process variable.Exemplary digital communication protocol comprises (the mixing Physical layer be made up of the digital communication signal in the 4-20mA simulating signal being superimposed upon standard), FOUNDATION tMfieldbus (the all-digital communication agreement of being promulgated in 1992 by ISA), Profibus communication protocol or other communication protocol.Also can implement wireless protocols, as technology for radio frequency, comprise
According to an embodiment, process variable transmitter 12 comprises detector 19, and it to extend in process pipeline 18 and is configured to the process variable of the process fluid in measuring process pipeline 18.Exemplary process variable comprises pressure, temperature, flow, liquid level, pH value, conductivity, turbidity, density, concentration, chemical composition etc.Process variable transmitter 12 comprises the housing 20 with the chamber 40 be formed in wherein, and chamber 40 extends between the first opening 42 and the second opening 46.First opening 42 preferably has cylindrical shape, makes end cap 26 can be threaded io housing 20.Similar end cap 24 seals the second compartment opens 46.
Single compartment process variable transmitter is known.This transmitter has the electronic module carried by the transmitter rubber disc (puck) be placed in housing usually, and described housing comprises terminal-connecting element.But in single compartment configuration, internal electronic device and other special-purpose member are exposed to process environment when cover removes.Therefore, some existing configurations be provided with adopt two compartment configuration, and wherein shell of transducer is divided into the first compartment and the second compartment by dividing wall.Opening in dividing wall is used for connecting up between two compartments.
As shown in Figure 1, transmitter 12 comprises polymer wall 53, and it is configured to provide environmental seal, and this environmental seal limits the first compartment 52 and the second compartment 50 in chamber 40.Polymer wall 53 and housing 20 are integrally formed (single-piece).More specifically, wall 53 manufactures in single molding process together with housing 20, makes to there is not seam between wall 53 and housing 20.Metering circuit 23 is supported on polymer wall 53 in the first compartment 52.Metering circuit 23 be configured to receive from process variable sensor process variable signal and output is provided.
Sealing is provided between the first compartment 52 in the chamber 40 that polymer wall 53 is formed within the casing 20 and the second compartment 50.As shown in Figure 1, transmitter 12 comprises pin assemblies 55, and it comprises the wiring pin 57 being connected to terminal screw assembly 59.Wiring pin 57 to be supported in the second compartment 50 and to be configured to be electrically connected to metering circuit 23.Wiring pin 57 by using known molded or other technology to be molded in polymer wall 53 and extending through polymer wall 53, and is used known welding or other technical battery and is connected to metering circuit 22 in the first compartment 52.
Fig. 2 illustrates the cut-open view of a part for pin assemblies 55.Pin assemblies 55 comprises wiring pin 57.At first end place, wiring pin 57 laterally extends into the second compartment 50 to terminal screw assembly 59.Wiring pin 57 to be molded in polymer wall 53 and to extend through polymer wall 53, to be connected to metering circuit 23 via welding or other interconnection technique.Terminal screw assembly 59 is configured to accept electrical connection.Terminal screw assembly 59 preferably includes terminal screw 64, fixed support 65 and fork (prong) 67, and fork 67 extends in the corresponding chamber in polymer wall 53 so that terminal screw assembly 59 is fixed to wall 53.As shown in Figure 2, fork 67 extends fully through polymer wall 53, and can tilt that terminal screw assembly 59 is firmly-fixed to described wall 53.Fork 67 can adopt the interconnection technique of any appropriate to be connected to wiring pin 57, and can be manufactured into discrete component.Pin assemblies 57 is formed by the punch components and screw 64 that comprise element 57,65 usually.
Fig. 3 is the front elevation of transmitter 12, the terminal assemblies 59A being arranged in compartment 50 is shown, 59B.Control loop terminal assemblies 59B is supported in the terminal block side of polymer wall 53 and is configured to be connected to process control loop 16.This terminal block side also supporting sensor terminal assemblies 59A of polymer wall 53, sensor side sub-component 59A is configured to be connected to the process variable sensor 19 of such as temperature sensor and so on.In configuration shown in Figure 3, the terminal block side of wall 53 can be accessed by operator when metering circuit 23 not being exposed to process environment in compartment 50.
Fig. 4 is the simplified block diagram of process variable transmitter 12, illustrates in greater detail metering circuit 23.As shown in Figure 4, metering circuit 23 to be arranged in chamber 52 and to comprise microprocessor 150, and microprocessor 150 is according to the instruction operation be loaded with in storer 152.Microprocessor 150 is by being positioned at analog to digital converter 156 in compartment 50 and sensor terminal 130 is connected to process variable sensor 154.Sensor 154 can be the process variable sensor of any type, comprises, such as, and temperature sensor.Microprocessor 150 is by being positioned at input/output circuitry 160 in compartment 50 and terminal 120 is connected to Two-wire process control loop 16.I/O circuit 160 is also configured to the electric power of electric power generation for powering to circuit 23 being derived from Two-wire process control loop 16.Optional display 22 also can carried within the casing 20 and for locally showing information.
As schematically shown in figure 4, polymer wall 53 is by shell of transducer 20 points of coelosis 50 and 52.Metering circuit 23 is positioned in chamber 52, and terminal 59A, 59B are positioned in chamber 50.As mentioned above, end cap 26 can be removed from shell of transducer 20, thus terminal 59A can be accessed by operator, 59B and chamber 50.Such as, this may be used for transmitter 12 being connected to Two-wire process control loop 16 and being used for metering circuit 23 to be connected to process variable sensor 19.
By adopting the present invention, the housing of process variable transmitter is manufactured by single molding process, and wherein polymer wall 53 provides the terminal block formed with housing.As used herein, term " integrated wiring plate " refers to the polymer wall 53 chamber in the housing of transmitter 12 being divided into two independent compartments.Comprising the molded of the shell of transducer 20 of polymer wall 53 for side by side formation can be any suitable molding technique, comprises injection molding.Adopt this technology, the pin 57 extending through terminal block is made integratedly with shell of transducer and extends through terminal block/polymer wall 53.Pin 57 can be fixed in place when molded shell 20 or in certain time afterwards.Compared with existing design, polymer wall provides barrier between chamber 50 and 52, and does not need the additional seal of such as O shape ring, mechanical connection etc. and so on.Similarly, can be located and fixed pin 57 by polymer wall 53, and not need extra insertion or sealing step.There is the possibility of any inefficacy in the seal which reduced between two chambeies 50 and 52.
Although the present invention has been described with reference to preferred embodiment, it will be recognized by those skilled in the art, when without departing from the spirit and scope of the present invention, can change in form and details.Although show temperature sensor, the process variable sensor of any type can be adopted.A kind of exemplary polymer is plastics.The terminal of any type can be placed in chamber 50, comprises sensor terminal, power terminal, loop terminals etc.The present invention does not require that both terminal 59A and 59B are positioned in chamber 50.

Claims (16)

1., with a process variable transmitter in industrial processes, comprising:
Housing, this housing has the chamber be formed at wherein, and this chamber extends between the first opening and the second opening, and described housing comprises the integrated wiring plate formed with this housing, and this integrated wiring plate defines the first compartment and the second compartment in described chamber;
Process variable sensor, it is configured to the process variable detecting industrial process;
Metering circuit, it to be carried in the first compartment and to be configured to the process variable signal that receives from process variable sensor and to provide output; With
Terminal-connecting element, it is carried on described terminal block in the second compartment, and is electrically connected to described metering circuit.
2. process variable transmitter according to claim 1, wherein electronics housing comprises polymkeric substance.
3. process variable transmitter according to claim 1, comprises wiring pin, and described wiring pin extends through polymer wall and provide electrical connection between metering circuit and terminal-connecting element.
4. process variable transmitter according to claim 3, comprises and is connected to wiring pin and the terminal screw assembly be arranged in the second compartment.
5. process variable transmitter according to claim 4, wherein terminal screw assembly comprises fork, and this fork extends in integrated wiring plate, thus terminal screw assembly is fixed to integrated wiring plate.
6. process variable transmitter according to claim 1, wherein terminal connector provides the electrical connection of leading to process variable sensor.
7. process variable transmitter according to claim 1, wherein terminal connector provides the electrical connection of leading to Two-wire process control loop.
8. process variable transmitter according to claim 4, comprises the screw being configured to electrical connector is fixed to terminal screw assembly.
9. process variable transmitter according to claim 1, wherein process variable sensor comprises temperature sensor.
10., for the manufacture of the method with process variable transmitter in industrial processes, comprise the steps:
Molding process variable transmitter housing, this process variable transmitter housing has the chamber that is formed in wherein and comprises the integrated wiring plate described chamber being divided into the first compartment and the second compartment;
There is provided electrical connector, this electrical connector extends through integrated wiring plate to the second compartment from the first compartment;
The measurement electron device being connected to electrical connector is placed in the first compartment; And
Process variable sensor is connected to the terminal screw assembly in the second compartment, terminal screw electrical component is connected to the electrical connector extending through integrated wiring plate.
11. methods according to claim 10, are wherein connected to Two-wire process control loop by metering circuit by electrical connector by the terminal screw assembly in use second compartment.
12. methods according to claim 10, wherein electrical connector comprises wiring pin.
13. methods according to claim 12, comprise the steps:
With the fork link post screw assembly extended in integrated wiring plate, thus terminal screw assembly is fixed to integrated wiring plate.
14. methods according to claim 10, wherein process variable sensor comprises temperature sensor.
15. methods according to claim 10, comprise the step adopting end cap seal first compartment and the second compartment.
16. methods according to claim 10, comprise step process control loop being connected to the terminal connector in the second compartment.
CN201410054296.5A 2013-09-24 2014-02-18 Process variable transmitter with dual compartment housin Pending CN104457800A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201711360421.5A CN107990916B (en) 2013-09-24 2014-02-18 Process variable transmitter with dual compartment housing

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US14/035,019 US10663931B2 (en) 2013-09-24 2013-09-24 Process variable transmitter with dual compartment housing
US14/035,019 2013-09-24

Related Child Applications (1)

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Publications (1)

Publication Number Publication Date
CN104457800A true CN104457800A (en) 2015-03-25

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CN201711360421.5A Active CN107990916B (en) 2013-09-24 2014-02-18 Process variable transmitter with dual compartment housing
CN201410054296.5A Pending CN104457800A (en) 2013-09-24 2014-02-18 Process variable transmitter with dual compartment housin
CN201420069438.0U Expired - Fee Related CN203758527U (en) 2013-09-24 2014-02-18 Process variable transmitter with double-compartment shell

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Application Number Title Priority Date Filing Date
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US (1) US10663931B2 (en)
EP (1) EP3049764B1 (en)
JP (1) JP6279087B2 (en)
CN (3) CN107990916B (en)
WO (1) WO2015047486A1 (en)

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US10663931B2 (en) * 2013-09-24 2020-05-26 Rosemount Inc. Process variable transmitter with dual compartment housing
CN114858343B (en) * 2022-03-24 2023-09-26 中国核动力研究设计院 Nuclear safety level transmitter based on inorganic solid gas heat insulating material

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US20150088277A1 (en) 2015-03-26
WO2015047486A1 (en) 2015-04-02
EP3049764B1 (en) 2018-09-12
JP2016534371A (en) 2016-11-04
JP6279087B2 (en) 2018-02-14
CN107990916B (en) 2021-07-06
CN203758527U (en) 2014-08-06
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CN107990916A (en) 2018-05-04
US10663931B2 (en) 2020-05-26

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